Soils were collected around trees on treelines in the western brooks
range Alaska varying in soil moisture. Three sites were chosen: Tussock
tundra (Mesic), Wet Sedge (Hydric), and Dryas-lichen tundra (Xeric). 8
similar trees were chosen per treatment based on their DBH and proximity
to the treeline. Snow fences were constructed as a treatment to build
larger snow packs around the given trees in winter and compared against
a control group where nothing was done besides sampling. In order to
reduce impact on these tree-plots 8 Ancillary trees were also chosen
based on the same DBH, proximity to treeline parameters and used for
seasonal sampling.
A previous project conducted at these sites fertilized soils around
similar trees. These soils were also sampled to identify long term
effects of fertilization. Soils were collected from control and
snowfence trees in march and late may/early June (Just after thaw) along
with resin strips (Except in 2020). Soil pore water was taken regularly
during the growing season (2017-2019). During 2019 collection
frequencies reduced due to staffing and were disrupted due to COVID in
2020 with an inability to visit the field sites.
K2SO4
| analyte | Site | YEAR | TIME | p.value | asterisk |
|---|---|---|---|---|---|
| MBN | Xeric | 2018 | Early Spring | 0.0459993 | * |
| PO4 | Mesic | 2017 | Late Winter | 0.0005795 | * |
| PO4.fum | Mesic | 2017 | Late Winter | 0.0014443 | * |
| TFPA | Hydric | 2018 | Early Spring | 0.0124263 | * |
| TRS | Xeric | 2018 | Early Spring | 0.0015616 | * |
All comparisons
| analyte | Site | YEAR | TIME | p.value | asterisk |
|---|---|---|---|---|---|
| MBC | Hydric | 2017 | Late Winter | 0.9242528 | NA |
| MBC | Hydric | 2018 | Early Spring | 0.6309733 | NA |
| MBC | Hydric | 2019 | Early Spring | 0.1736374 | NA |
| MBC | Mesic | 2017 | Late Winter | 0.2351039 | NA |
| MBC | Mesic | 2018 | Early Spring | 0.3767047 | NA |
| MBC | Mesic | 2019 | Early Spring | 0.4034522 | NA |
| MBC | Xeric | 2017 | Late Winter | 0.8767061 | NA |
| MBC | Xeric | 2018 | Early Spring | 0.0723087 | NA |
| MBC | Xeric | 2019 | Early Spring | 0.5367112 | NA |
| MBN | Hydric | 2017 | Late Winter | 0.4577312 | NA |
| MBN | Hydric | 2018 | Early Spring | 0.5318262 | NA |
| MBN | Hydric | 2019 | Early Spring | 0.1827473 | NA |
| MBN | Mesic | 2017 | Late Winter | 0.4644693 | NA |
| MBN | Mesic | 2018 | Early Spring | 0.4257308 | NA |
| MBN | Mesic | 2019 | Early Spring | 0.5062197 | NA |
| MBN | Xeric | 2017 | Late Winter | 0.2733834 | NA |
| MBN | Xeric | 2018 | Early Spring | 0.0459993 | * |
| MBN | Xeric | 2019 | Early Spring | 0.3603539 | NA |
| NH4 | Hydric | 2017 | Late Winter | 0.4228383 | NA |
| NH4 | Hydric | 2018 | Early Spring | 0.3189400 | NA |
| NH4 | Hydric | 2019 | Early Spring | 0.2587825 | NA |
| NH4 | Mesic | 2017 | Late Winter | 0.6445248 | NA |
| NH4 | Mesic | 2018 | Early Spring | 0.2476791 | NA |
| NH4 | Mesic | 2019 | Early Spring | 0.2868158 | NA |
| NH4 | Xeric | 2017 | Late Winter | 0.1265287 | NA |
| NH4 | Xeric | 2018 | Early Spring | 0.1018585 | NA |
| NH4 | Xeric | 2019 | Early Spring | 0.3190037 | NA |
| NO3 | Hydric | 2017 | Late Winter | 0.7447394 | NA |
| NO3 | Hydric | 2018 | Early Spring | 0.1286781 | NA |
| NO3 | Hydric | 2019 | Early Spring | 0.3457828 | NA |
| NO3 | Mesic | 2017 | Late Winter | 0.4303936 | NA |
| NO3 | Mesic | 2018 | Early Spring | 0.5627412 | NA |
| NO3 | Mesic | 2019 | Early Spring | 0.2782300 | NA |
| NO3 | Xeric | 2017 | Late Winter | 0.2067186 | NA |
| NO3 | Xeric | 2018 | Early Spring | 0.5964418 | NA |
| NO3 | Xeric | 2019 | Early Spring | 0.5464968 | NA |
| PO4 | Hydric | 2017 | Late Winter | 0.6219360 | NA |
| PO4 | Hydric | 2018 | Early Spring | 0.6332027 | NA |
| PO4 | Hydric | 2019 | Early Spring | 0.9208946 | NA |
| PO4 | Mesic | 2017 | Late Winter | 0.0005795 | * |
| PO4 | Mesic | 2018 | Early Spring | 0.2821892 | NA |
| PO4 | Mesic | 2019 | Early Spring | NaN | NA |
| PO4 | Xeric | 2017 | Late Winter | 0.2969134 | NA |
| PO4 | Xeric | 2018 | Early Spring | 0.1286896 | NA |
| PO4 | Xeric | 2019 | Early Spring | 0.2288003 | NA |
| PO4.fum | Hydric | 2017 | Late Winter | 0.3946057 | NA |
| PO4.fum | Hydric | 2018 | Early Spring | 0.9225939 | NA |
| PO4.fum | Hydric | 2019 | Early Spring | 0.8841150 | NA |
| PO4.fum | Mesic | 2017 | Late Winter | 0.0014443 | * |
| PO4.fum | Mesic | 2018 | Early Spring | 0.8352359 | NA |
| PO4.fum | Mesic | 2019 | Early Spring | 0.7492556 | NA |
| PO4.fum | Xeric | 2017 | Late Winter | 0.5309334 | NA |
| PO4.fum | Xeric | 2018 | Early Spring | 0.3224832 | NA |
| PO4.fum | Xeric | 2019 | Early Spring | 0.2023210 | NA |
| TFPA | Hydric | 2017 | Late Winter | 0.5821164 | NA |
| TFPA | Hydric | 2018 | Early Spring | 0.0124263 | * |
| TFPA | Hydric | 2019 | Early Spring | 0.4173300 | NA |
| TFPA | Mesic | 2017 | Late Winter | 0.0743117 | NA |
| TFPA | Mesic | 2018 | Early Spring | 0.6880129 | NA |
| TFPA | Mesic | 2019 | Early Spring | 0.3348522 | NA |
| TFPA | Xeric | 2017 | Late Winter | 0.6976218 | NA |
| TFPA | Xeric | 2018 | Early Spring | 0.4146803 | NA |
| TFPA | Xeric | 2019 | Early Spring | 0.2464429 | NA |
| TN.fum | Hydric | 2017 | Late Winter | 0.6137744 | NA |
| TN.fum | Hydric | 2018 | Early Spring | 0.9945790 | NA |
| TN.fum | Hydric | 2019 | Early Spring | 0.3533706 | NA |
| TN.fum | Mesic | 2017 | Late Winter | 0.2196318 | NA |
| TN.fum | Mesic | 2018 | Early Spring | 0.4382704 | NA |
| TN.fum | Mesic | 2019 | Early Spring | 0.3518988 | NA |
| TN.fum | Xeric | 2017 | Late Winter | 0.2101150 | NA |
| TN.fum | Xeric | 2018 | Early Spring | 0.0976950 | NA |
| TN.fum | Xeric | 2019 | Early Spring | 0.7061835 | NA |
| TN.k2so4 | Hydric | 2017 | Late Winter | 0.4339124 | NA |
| TN.k2so4 | Hydric | 2018 | Early Spring | 0.1324980 | NA |
| TN.k2so4 | Hydric | 2019 | Early Spring | 0.4933220 | NA |
| TN.k2so4 | Mesic | 2017 | Late Winter | 0.2813560 | NA |
| TN.k2so4 | Mesic | 2018 | Early Spring | 0.5504293 | NA |
| TN.k2so4 | Mesic | 2019 | Early Spring | 0.3198908 | NA |
| TN.k2so4 | Xeric | 2017 | Late Winter | 0.1871344 | NA |
| TN.k2so4 | Xeric | 2018 | Early Spring | 0.1557129 | NA |
| TN.k2so4 | Xeric | 2019 | Early Spring | 0.3032183 | NA |
| TOC.fum | Hydric | 2017 | Late Winter | 0.4751290 | NA |
| TOC.fum | Hydric | 2018 | Early Spring | 0.5239418 | NA |
| TOC.fum | Hydric | 2019 | Early Spring | 0.3488814 | NA |
| TOC.fum | Mesic | 2017 | Late Winter | 0.0835000 | NA |
| TOC.fum | Mesic | 2018 | Early Spring | 0.3804673 | NA |
| TOC.fum | Mesic | 2019 | Early Spring | 0.3234169 | NA |
| TOC.fum | Xeric | 2017 | Late Winter | 0.5379341 | NA |
| TOC.fum | Xeric | 2018 | Early Spring | 0.1392725 | NA |
| TOC.fum | Xeric | 2019 | Early Spring | 0.9413714 | NA |
| TOC.k2so4 | Hydric | 2017 | Late Winter | 0.4555155 | NA |
| TOC.k2so4 | Hydric | 2018 | Early Spring | 0.1300379 | NA |
| TOC.k2so4 | Hydric | 2019 | Early Spring | 0.4229420 | NA |
| TOC.k2so4 | Mesic | 2017 | Late Winter | 0.1194345 | NA |
| TOC.k2so4 | Mesic | 2018 | Early Spring | 0.4628987 | NA |
| TOC.k2so4 | Mesic | 2019 | Early Spring | 0.3520008 | NA |
| TOC.k2so4 | Xeric | 2017 | Late Winter | 0.2140845 | NA |
| TOC.k2so4 | Xeric | 2018 | Early Spring | 0.1504672 | NA |
| TOC.k2so4 | Xeric | 2019 | Early Spring | 0.2028911 | NA |
| TRS | Hydric | 2017 | Late Winter | 0.5977676 | NA |
| TRS | Hydric | 2018 | Early Spring | 0.1616088 | NA |
| TRS | Hydric | 2019 | Early Spring | 0.2283456 | NA |
| TRS | Mesic | 2017 | Late Winter | 0.3575127 | NA |
| TRS | Mesic | 2018 | Early Spring | 0.5151771 | NA |
| TRS | Mesic | 2019 | Early Spring | 0.6518428 | NA |
| TRS | Xeric | 2017 | Late Winter | 0.8898936 | NA |
| TRS | Xeric | 2018 | Early Spring | 0.0015616 | * |
| TRS | Xeric | 2019 | Early Spring | 0.4527488 | NA |
| phenolics | Hydric | 2017 | Late Winter | 0.7061021 | NA |
| phenolics | Hydric | 2018 | Early Spring | 0.1059705 | NA |
| phenolics | Hydric | 2019 | Early Spring | 0.2626072 | NA |
| phenolics | Mesic | 2017 | Late Winter | 0.5096703 | NA |
| phenolics | Mesic | 2018 | Early Spring | 0.3014450 | NA |
| phenolics | Mesic | 2019 | Early Spring | 0.0971096 | NA |
| phenolics | Xeric | 2017 | Late Winter | 0.5109847 | NA |
| phenolics | Xeric | 2018 | Early Spring | 0.8679635 | NA |
| phenolics | Xeric | 2019 | Early Spring | 0.6036452 | NA |
Significant comparisons
| analyte | Site | YEAR | TIME | p.value | asterisk |
|---|---|---|---|---|---|
| NH4.H2O | Xeric | 2018 | Early Spring | 0.0273894 | * |
| TRS.H2O | Xeric | 2018 | Early Spring | 0.0254819 | * |
| analyte | Site | YEAR | TIME | p.value | asterisk |
|---|---|---|---|---|---|
| NH4.H2O | Hydric | 2018 | Early Spring | 0.2889907 | NA |
| NH4.H2O | Hydric | 2019 | Early Spring | 0.5343913 | NA |
| NH4.H2O | Mesic | 2018 | Early Spring | 0.5420167 | NA |
| NH4.H2O | Mesic | 2019 | Early Spring | 0.1883625 | NA |
| NH4.H2O | Xeric | 2018 | Early Spring | 0.0273894 | * |
| NH4.H2O | Xeric | 2019 | Early Spring | 0.1494704 | NA |
| NO3.H2O | Hydric | 2018 | Early Spring | 0.8209811 | NA |
| NO3.H2O | Hydric | 2019 | Early Spring | 0.4171057 | NA |
| NO3.H2O | Mesic | 2018 | Early Spring | 0.5466433 | NA |
| NO3.H2O | Mesic | 2019 | Early Spring | 0.4726539 | NA |
| NO3.H2O | Xeric | 2018 | Early Spring | 0.3951196 | NA |
| NO3.H2O | Xeric | 2019 | Early Spring | 0.5685136 | NA |
| PO4.H2O | Hydric | 2018 | Early Spring | 0.5219912 | NA |
| PO4.H2O | Hydric | 2019 | Early Spring | 0.3982464 | NA |
| PO4.H2O | Mesic | 2018 | Early Spring | 0.3220990 | NA |
| PO4.H2O | Mesic | 2019 | Early Spring | 0.1862574 | NA |
| PO4.H2O | Xeric | 2018 | Early Spring | 0.2169554 | NA |
| PO4.H2O | Xeric | 2019 | Early Spring | 0.1464784 | NA |
| TFPA.H2O | Hydric | 2018 | Early Spring | 0.2247949 | NA |
| TFPA.H2O | Hydric | 2019 | Early Spring | 0.0668502 | NA |
| TFPA.H2O | Mesic | 2018 | Early Spring | 0.7016381 | NA |
| TFPA.H2O | Mesic | 2019 | Early Spring | 0.6210319 | NA |
| TFPA.H2O | Xeric | 2018 | Early Spring | 0.8390267 | NA |
| TFPA.H2O | Xeric | 2019 | Early Spring | 0.8229049 | NA |
| TRS.H2O | Hydric | 2018 | Early Spring | 0.4725506 | NA |
| TRS.H2O | Hydric | 2019 | Early Spring | 0.7770201 | NA |
| TRS.H2O | Mesic | 2018 | Early Spring | 0.0997968 | NA |
| TRS.H2O | Mesic | 2019 | Early Spring | 0.7744091 | NA |
| TRS.H2O | Xeric | 2018 | Early Spring | 0.0254819 | * |
| TRS.H2O | Xeric | 2019 | Early Spring | 0.2437419 | NA |
| analyte | variable | numDF | denDF | F-value | p_value | asterisk |
|---|---|---|---|---|---|---|
| NH4 | MONTH | 1 | 1533 | 28.033374 | 0.000 | * |
| NH4 | YEAR | 1 | 1533 | 369.937357 | 0.000 | * |
| NO3 | MONTH | 1 | 1533 | 4.621791 | 0.032 | * |
| NO3 | YEAR | 1 | 1533 | 142.897963 | 0.000 | * |
| NO3 | Site | 2 | 1533 | 12.405382 | 0.000 | * |
| NO3 | treatment | 1 | 1533 | 14.671778 | 0.000 | * |
| PO4 | MONTH | 1 | 1497 | 8.571502 | 0.003 | * |
| PO4 | YEAR | 1 | 1497 | 463.374925 | 0.000 | * |
| PO4 | Site | 2 | 1497 | 4.888577 | 0.008 | * |
| TFPA | Site | 2 | 1463 | 9.385003 | 0.000 | * |
| TRS | MONTH | 1 | 1540 | 41.938043 | 0.000 | * |
| TRS | YEAR | 1 | 1540 | 69.095406 | 0.000 | * |
| analyte | variable | numDF | denDF | F-value | p_value | asterisk |
|---|---|---|---|---|---|---|
| Mass | MONTH | 1 | 1463 | 0.0342764 | 0.853 | NA |
| Mass | YEAR | 1 | 1463 | 1.5967304 | 0.207 | NA |
| Mass | Site | 2 | 1463 | 1.0022801 | 0.367 | NA |
| Mass | treatment | 1 | 1463 | 0.9551155 | 0.329 | NA |
| NH4 | MONTH | 1 | 1533 | 28.0333740 | 0.000 | * |
| NH4 | YEAR | 1 | 1533 | 369.9373565 | 0.000 | * |
| NH4 | Site | 2 | 1533 | 0.9328648 | 0.394 | NA |
| NH4 | treatment | 1 | 1533 | 2.7065628 | 0.100 | NA |
| NO3 | MONTH | 1 | 1533 | 4.6217907 | 0.032 | * |
| NO3 | YEAR | 1 | 1533 | 142.8979632 | 0.000 | * |
| NO3 | Site | 2 | 1533 | 12.4053825 | 0.000 | * |
| NO3 | treatment | 1 | 1533 | 14.6717780 | 0.000 | * |
| PO4 | MONTH | 1 | 1497 | 8.5715020 | 0.003 | * |
| PO4 | YEAR | 1 | 1497 | 463.3749246 | 0.000 | * |
| PO4 | Site | 2 | 1497 | 4.8885771 | 0.008 | * |
| PO4 | treatment | 1 | 1497 | 1.0705854 | 0.301 | NA |
| TFPA | MONTH | 1 | 1463 | 0.6014594 | 0.438 | NA |
| TFPA | YEAR | 1 | 1463 | 0.2499585 | 0.617 | NA |
| TFPA | Site | 2 | 1463 | 9.3850031 | 0.000 | * |
| TFPA | treatment | 1 | 1463 | 0.0000732 | 0.993 | NA |
| TRS | MONTH | 1 | 1540 | 41.9380431 | 0.000 | * |
| TRS | YEAR | 1 | 1540 | 69.0954058 | 0.000 | * |
| TRS | Site | 2 | 1540 | 2.7695988 | 0.063 | NA |
| TRS | treatment | 1 | 1540 | 1.0642374 | 0.302 | NA |
Differences between sites.
Treatment differences were almost non existent.only over winter NH4 Xeric 2019 showed differences between snowfence and control.
| analyte | YEAR | Treatment | Purpose2 | p.value | asterisk |
|---|---|---|---|---|---|
| Ammonium | 2017 | Control | OW | 0.1828669 | NA |
| Ammonium | 2017 | Snowfence | OW | 0.2359539 | NA |
| Ammonium | 2018 | Control | OW-GS | 0.0730018 | NA |
| Ammonium | 2018 | Control | GS | 0.0119577 | * |
| Ammonium | 2018 | Snowfence | OW-GS | 0.0263591 | * |
| Ammonium | 2018 | Snowfence | GS | 0.0000326 | * |
| Ammonium | 2019 | Control | OW | 0.0143492 | * |
| Ammonium | 2019 | Control | GS | 0.0436442 | * |
| Ammonium | 2019 | Snowfence | OW | 0.0065189 | * |
| Ammonium | 2019 | Snowfence | GS | 0.0040354 | * |
| Ammonium | 2020 | Control | OW-GS | 0.1934751 | NA |
| Ammonium | 2020 | Snowfence | OW-GS | 0.5398501 | NA |
| Ammonium | 2021 | Control | OW | 0.7070097 | NA |
| Ammonium | 2021 | Snowfence | OW | 0.3932623 | NA |
| Nitrate | 2017 | Control | OW | 0.4052575 | NA |
| Nitrate | 2017 | Snowfence | OW | 0.0538127 | NA |
| Nitrate | 2018 | Control | OW-GS | 0.3414035 | NA |
| Nitrate | 2018 | Control | GS | 0.2097259 | NA |
| Nitrate | 2018 | Snowfence | OW-GS | 0.1415409 | NA |
| Nitrate | 2018 | Snowfence | GS | 0.1967999 | NA |
| Nitrate | 2019 | Control | OW | NaN | NA |
| Nitrate | 2019 | Control | GS | 0.4086785 | NA |
| Nitrate | 2019 | Snowfence | OW | NaN | NA |
| Nitrate | 2019 | Snowfence | GS | 0.4388928 | NA |
| Nitrate | 2020 | Control | OW-GS | 0.0892656 | NA |
| Nitrate | 2020 | Snowfence | OW-GS | 0.0181929 | * |
| Nitrate | 2021 | Control | OW | 0.0037983 | * |
| Nitrate | 2021 | Snowfence | OW | 0.0000001 | * |
| Phosphate | 2017 | Control | OW | 0.0000034 | * |
| Phosphate | 2017 | Snowfence | OW | 0.0056395 | * |
| Phosphate | 2018 | Control | OW-GS | 0.0000949 | * |
| Phosphate | 2018 | Control | GS | 0.0033205 | * |
| Phosphate | 2018 | Snowfence | OW-GS | 0.0510462 | NA |
| Phosphate | 2018 | Snowfence | GS | 0.0535561 | NA |
| Phosphate | 2019 | Control | OW | 0.0048510 | * |
| Phosphate | 2019 | Control | GS | NaN | NA |
| Phosphate | 2019 | Snowfence | OW | 0.0233137 | * |
| Phosphate | 2019 | Snowfence | GS | NaN | NA |
| Phosphate | 2020 | Control | OW-GS | 0.0133618 | * |
| Phosphate | 2020 | Snowfence | OW-GS | 0.3372624 | NA |
| Phosphate | 2021 | Control | OW | 0.0334202 | * |
| Phosphate | 2021 | Snowfence | OW | 0.0336466 | * |
Comparing Sites (Significant only)
## NULL
Due to soil plot concerns only ancillary plots were harvested multiple times per year. K2SO4:
| analyte | variable | numDF | denDF | F-value | p_value | asterisk |
|---|---|---|---|---|---|---|
| NH4 | MONTH | 1 | 2243 | 26.040128 | 0.000 | * |
| NH4 | YEAR | 1 | 2243 | 286.445196 | 0.000 | * |
| NO3 | YEAR | 1 | 2206 | 99.966287 | 0.000 | * |
| NO3 | Site | 2 | 2206 | 34.799483 | 0.000 | * |
| NO3 | treatment | 2 | 2206 | 5.281392 | 0.005 | * |
| PO4 | MONTH | 1 | 2178 | 30.168079 | 0.000 | * |
| PO4 | YEAR | 1 | 2178 | 379.187416 | 0.000 | * |
| PO4 | Site | 2 | 2178 | 4.179465 | 0.015 | * |
| TFPA | MONTH | 1 | 2130 | 4.696632 | 0.030 | * |
| TFPA | Site | 2 | 2130 | 4.727536 | 0.009 | * |
| TRS | MONTH | 1 | 2231 | 41.523906 | 0.000 | * |
| TRS | YEAR | 1 | 2231 | 114.791131 | 0.000 | * |
| TRS | Site | 2 | 2231 | 4.821214 | 0.008 | * |
| TRS | treatment | 2 | 2231 | 6.195714 | 0.002 | * |
| analyte | variable | numDF | denDF | F-value | p_value | asterisk |
|---|---|---|---|---|---|---|
| Mass | MONTH | 1 | 2208 | 0.0612205 | 0.805 | NA |
| Mass | YEAR | 1 | 2208 | 1.8015229 | 0.180 | NA |
| Mass | Site | 2 | 2208 | 1.2360672 | 0.291 | NA |
| Mass | treatment | 2 | 2208 | 1.1057461 | 0.331 | NA |
| NH4 | MONTH | 1 | 2243 | 26.0401282 | 0.000 | * |
| NH4 | YEAR | 1 | 2243 | 286.4451963 | 0.000 | * |
| NH4 | Site | 2 | 2243 | 0.1469776 | 0.863 | NA |
| NH4 | treatment | 2 | 2243 | 1.3044999 | 0.272 | NA |
| NO3 | MONTH | 1 | 2206 | 0.0094192 | 0.923 | NA |
| NO3 | YEAR | 1 | 2206 | 99.9662866 | 0.000 | * |
| NO3 | Site | 2 | 2206 | 34.7994825 | 0.000 | * |
| NO3 | treatment | 2 | 2206 | 5.2813921 | 0.005 | * |
| PO4 | MONTH | 1 | 2178 | 30.1680789 | 0.000 | * |
| PO4 | YEAR | 1 | 2178 | 379.1874157 | 0.000 | * |
| PO4 | Site | 2 | 2178 | 4.1794646 | 0.015 | * |
| PO4 | treatment | 2 | 2178 | 1.3890078 | 0.250 | NA |
| TFPA | MONTH | 1 | 2130 | 4.6966325 | 0.030 | * |
| TFPA | YEAR | 1 | 2130 | 0.0016565 | 0.968 | NA |
| TFPA | Site | 2 | 2130 | 4.7275359 | 0.009 | * |
| TFPA | treatment | 2 | 2130 | 0.8810253 | 0.415 | NA |
| TRS | MONTH | 1 | 2231 | 41.5239057 | 0.000 | * |
| TRS | YEAR | 1 | 2231 | 114.7911306 | 0.000 | * |
| TRS | Site | 2 | 2231 | 4.8212145 | 0.008 | * |
| TRS | treatment | 2 | 2231 | 6.1957137 | 0.002 | * |
Due to soil plot concerns only ancillary plots were harvested multiple times per year. K2SO4:
Resin strips were extracted in 2M KCl
ANOVA results. Differences between sites
Due to soil plot concerns only ancillary plots were harvested multiple times per year. K2SO4:
Resin strips were extracted in 2M KCl
Homogenized soil samples collected in the field in early(end of may begining of June) and late spring (Late June or early July) from 2017, 2018 and 2019 were sent to EMSL for FTICR analysis.
Non-polar extracts were strongly dominated by low-O aliphatic molecules and skewed the overall trends when we combined results from polar and non-polar extracts. We therefore analyze the two extract types separately, and focus primarily on the polar (water) extracts.
Polar:
| Df | SumsOfSqs | MeanSqs | F.Model | R2 | Pr(>F) | |
|---|---|---|---|---|---|---|
| Site | 2 | 0.2048378 | 0.1024189 | 109.2342208 | 0.7080634 | 0.001 |
| Year | 1 | 0.0011243 | 0.0011243 | 1.1990670 | 0.0038862 | 0.274 |
| Season | 2 | 0.0013712 | 0.0006856 | 0.7312319 | 0.0047399 | 0.493 |
| Site:Year | 2 | 0.0278093 | 0.0139047 | 14.8299373 | 0.0961286 | 0.001 |
| Site:Season | 3 | 0.0083759 | 0.0027920 | 2.9777402 | 0.0289529 | 0.034 |
| Year:Season | 1 | 0.0007694 | 0.0007694 | 0.8205613 | 0.0026595 | 0.388 |
| Residuals | 48 | 0.0450052 | 0.0009376 | NA | 0.1555696 | NA |
| Total | 59 | 0.2892930 | NA | NA | 1.0000000 | NA |
Polar PERMANOVA results
Site, Site:Year were significant (p < 0.05)
Site accounted for 71 % of total variation among samples (R2= 0.71)
Non-Polar:
| Df | SumsOfSqs | MeanSqs | F.Model | R2 | Pr(>F) | |
|---|---|---|---|---|---|---|
| Site | 2 | 0.0815983 | 0.0407992 | 95.7669139 | 0.6687323 | 0.001 |
| Year | 1 | 0.0031369 | 0.0031369 | 7.3631567 | 0.0257082 | 0.016 |
| Season | 2 | 0.0019339 | 0.0009670 | 2.2697396 | 0.0158494 | 0.121 |
| Site:Year | 2 | 0.0123377 | 0.0061689 | 14.4800301 | 0.1011128 | 0.001 |
| Site:Season | 3 | 0.0025707 | 0.0008569 | 2.0113723 | 0.0210679 | 0.120 |
| Year:Season | 1 | -0.0000074 | -0.0000074 | -0.0173272 | -0.0000605 | 0.999 |
| Residuals | 48 | 0.0204492 | 0.0004260 | NA | 0.1675900 | NA |
| Total | 59 | 0.1220194 | NA | NA | 1.0000000 | NA |
Non-Polar PERMANOVA results
There was a strong separation among the three Site/soil types. Hydric and Xeric soils were strongly dominated by aliphatic (simple) molecules, whereas Mesic soils were dominated by lignin-like, aromatic, and condensed aromatic (complex) molecules.
Hydric Only
| Class | Xeric | Mesic | Hydric |
|---|---|---|---|
| aliphatic | 172 | 483 | 294 |
| aromatic | 32 | 135 | 22 |
| condensed aromatic | 10 | 65 | 17 |
| unsaturated/lignin | 122 | 703 | 47 |
Non-Polar:
| Df | SumsOfSqs | MeanSqs | F.Model | R2 | Pr(>F) | |
|---|---|---|---|---|---|---|
| Site | 2 | 0.0815983 | 0.0407992 | 95.7669139 | 0.6687323 | 0.001 |
| Year | 1 | 0.0031369 | 0.0031369 | 7.3631567 | 0.0257082 | 0.016 |
| Season | 2 | 0.0019339 | 0.0009670 | 2.2697396 | 0.0158494 | 0.121 |
| Site:Year | 2 | 0.0123377 | 0.0061689 | 14.4800301 | 0.1011128 | 0.001 |
| Site:Season | 3 | 0.0025707 | 0.0008569 | 2.0113723 | 0.0210679 | 0.120 |
| Year:Season | 1 | -0.0000074 | -0.0000074 | -0.0173272 | -0.0000605 | 0.999 |
| Residuals | 48 | 0.0204492 | 0.0004260 | NA | 0.1675900 | NA |
| Total | 59 | 0.1220194 | NA | NA | 1.0000000 | NA |
Non-Polar PERMANOVA results
| Class | Xeric | Mesic | Hydric |
|---|---|---|---|
| aliphatic | 172 | 483 | 294 |
| aromatic | 32 | 135 | 22 |
| condensed aromatic | 10 | 65 | 17 |
| unsaturated/lignin | 122 | 703 | 47 |
Date run: 2023-09-11
## R version 4.2.3 (2023-03-15 ucrt)
## Platform: x86_64-w64-mingw32/x64 (64-bit)
## Running under: Windows 10 x64 (build 19045)
##
## Matrix products: default
##
## locale:
## [1] LC_COLLATE=English_United States.utf8
## [2] LC_CTYPE=English_United States.utf8
## [3] LC_MONETARY=English_United States.utf8
## [4] LC_NUMERIC=C
## [5] LC_TIME=English_United States.utf8
##
## attached base packages:
## [1] grid stats graphics grDevices utils datasets methods
## [8] base
##
## other attached packages:
## [1] cowplot_1.1.1 agricolae_1.3-6 doBy_4.6.17 ggpubr_0.6.0
## [5] pracma_2.4.2 reshape2_1.4.4 ggbreak_0.1.2 ggExtra_0.10.0
## [9] lubridate_1.9.2 forcats_1.0.0 stringr_1.5.0 dplyr_1.1.2
## [13] purrr_1.0.1 readr_2.1.4 tidyr_1.3.0 tibble_3.2.1
## [17] tidyverse_2.0.0 ggbiplot_0.55 scales_1.2.1 plyr_1.8.8
## [21] ggplot2_3.4.1 vegan_2.6-4 lattice_0.20-45 permute_0.9-7
## [25] tarchetypes_0.7.7 targets_1.2.0
##
## loaded via a namespace (and not attached):
## [1] colorspace_2.1-0 ggsignif_0.6.4 ellipsis_0.3.2
## [4] fs_1.6.2 aplot_0.2.0 rstudioapi_0.15.0
## [7] farver_2.1.1 listenv_0.9.0 furrr_0.3.1
## [10] Deriv_4.1.3 fansi_1.0.4 codetools_0.2-19
## [13] splines_4.2.3 cachem_1.0.8 knitr_1.43
## [16] broom_1.0.5 cluster_2.1.4 shiny_1.7.4.1
## [19] compiler_4.2.3 backports_1.4.1 Matrix_1.6-0
## [22] fastmap_1.1.1 cli_3.6.1 later_1.3.1
## [25] htmltools_0.5.5 tools_4.2.3 igraph_1.5.0
## [28] gtable_0.3.3 glue_1.6.2 Rcpp_1.0.11
## [31] carData_3.0-5 vctrs_0.6.3 nlme_3.1-162
## [34] xfun_0.39 globals_0.16.2 ps_1.7.5
## [37] timechange_0.2.0 mime_0.12 miniUI_0.1.1.1
## [40] lifecycle_1.0.3 rstatix_0.7.2 future_1.33.0
## [43] MASS_7.3-58.2 microbenchmark_1.4.10 hms_1.1.3
## [46] promises_1.2.0.1 parallel_4.2.3 yaml_2.3.7
## [49] memoise_2.0.1 ggfun_0.1.2 yulab.utils_0.0.7
## [52] labelled_2.12.0 stringi_1.7.12 highr_0.10
## [55] klaR_1.7-2 AlgDesign_1.2.1 PNWColors_0.1.0
## [58] rlang_1.1.1 pkgconfig_2.0.3 evaluate_0.21
## [61] labeling_0.4.2 patchwork_1.1.2 processx_3.8.2
## [64] tidyselect_1.2.0 parallelly_1.36.0 magrittr_2.0.3
## [67] R6_2.5.1 generics_0.1.3 base64url_1.4
## [70] combinat_0.0-8 pillar_1.9.0 haven_2.5.3
## [73] withr_2.5.0 mgcv_1.8-42 abind_1.4-5
## [76] car_3.1-2 questionr_0.7.8 utf8_1.2.3
## [79] rmarkdown_2.23 tzdb_0.4.0 future.callr_0.8.1
## [82] data.table_1.14.8 callr_3.7.3 digest_0.6.33
## [85] xtable_1.8-4 httpuv_1.6.11 gridGraphics_0.5-1
## [88] munsell_0.5.0 ggplotify_0.1.2